WO2017201694A1 - Procédé de mise en oeuvre de csfb et dispositif de réseau d'accès - Google Patents

Procédé de mise en oeuvre de csfb et dispositif de réseau d'accès Download PDF

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Publication number
WO2017201694A1
WO2017201694A1 PCT/CN2016/083357 CN2016083357W WO2017201694A1 WO 2017201694 A1 WO2017201694 A1 WO 2017201694A1 CN 2016083357 W CN2016083357 W CN 2016083357W WO 2017201694 A1 WO2017201694 A1 WO 2017201694A1
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Prior art keywords
network device
access network
location information
distance
access
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PCT/CN2016/083357
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English (en)
Chinese (zh)
Inventor
许莉
刘雪红
张振宇
章健
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华为技术有限公司
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Priority to PCT/CN2016/083357 priority Critical patent/WO2017201694A1/fr
Publication of WO2017201694A1 publication Critical patent/WO2017201694A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

Definitions

  • the embodiments of the present invention relate to the field of communications, and in particular, to a CSFB implementation method and an access network device.
  • the voice service of the UE may be dropped from the LTE network/5G network to the 2G/3G network by using the redirection-based CSFB technology.
  • the fallback process is specifically: when the UE needs to perform voice service in the LTE network, the UE moves to the mobility management entity (English: Mobility Management Entity, referred to as: The MME) initiates a CSFB access request, and after receiving the request, the MME sends an S1-AP UE context modification request to an evolved base station (English: evolutional Node B, eNodeB for short) (English: S1-AP UE Context Modification Request)
  • the eNodeB may send a radio resource control (English: Radio Resource Control, RRC) connection release message to the UE to indicate that the UE will Voice service falls back to the 3
  • RRC Radio Resource Control
  • the base station (English: NodeB) in the 3G network needs to perform a search in the entire cell covered by itself to search for the UE, thereby establishing a connection with the UE.
  • NodeB the base station
  • the time that the NodeB searches for the UE is long, so that the delay of the UE to drop the voice service from the LTE network to the 3G network is large.
  • the embodiment of the invention provides a CSFB implementation method and an access network device, which solves the problem that when the voice service of the UE is dropped from the LTE network/5G network to the 2G/3G network by using the CSFB technology based on the redirection, the delay is large. problem.
  • the embodiment of the present invention adopts the following technical solutions:
  • a first aspect of the embodiments of the present invention provides a CSFB implementation method, including:
  • the first access network device in the first network receives, by the second access network device in the second network, the UE that needs to drop the voice service from the currently camped second network to the first network in the second access network. Position information under the device, then, the first access network device may determine the search range according to the received location information, and finally perform a search according to the determined search range, and after searching for the UE, establish a connection with the UE, so as to pass the A network provides voice services for the UE.
  • the first access network device receives the location information of the UE sent by the second access network device under the second access network device, and determines the search range according to the received location information, and then Searching according to the determined search range, and after searching for the UE, establishing a connection with the UE to provide voice services for the UE through the first network.
  • the search is performed according to the search range of the received location of the UE under the second access network device, indicating that the UE is located in the cell where the first access network device is located, compared to the first connection.
  • the search is performed in the entire cell where the network access device is located, which reduces the search range, thereby reducing the delay when the voice service of the UE is dropped from the second network to the first network by using the CSFB technology based on the redirection.
  • the determining, by the first access network device, the search range according to the location information may include: the first access network device Determining, according to the location information, a distance between the UE and the second access network device, that is, a first distance a, and then according to the first distance a and a distance between the first access network device and the second access network device, that is, The second distance b determines a reference range of the distance between the UE and the first access network device, the reference range is
  • the search range is
  • the UE is located at the first connection.
  • the cell may be searched from the edge of the cell where the first access network device is located to the inner side of the cell to shorten the search time.
  • the first network may be a Universal Mobile Telecommunications System (UMTS) network.
  • UMTS Universal Mobile Telecommunications System
  • the determining, by the first access network device, the first distance a according to the location information may include: determining, by the first access network device, the transmission delay according to the location information (English: Transport Propagation Delay) , abbreviated as: Tp) and the strongest path position, and then the first distance a is determined according to the Tp and the strongest path position.
  • the location information English: Transport Propagation Delay
  • the first network is a Global System for Mobile Communications (GSM) network.
  • GSM Global System for Mobile Communications
  • the determining, by the first access network device, the first distance a according to the location information may include: determining, by the first access network device, the first time advance according to the location information (English: Timing) Advance, abbreviated as: TA), then determines a first distance a according to the first TA, where the first TA is a timing advance of the UE to send data under the first access network device.
  • TA Timing Advance
  • the second network may be an LTE network
  • the location information may include at least one of the following: loopback time (English: Round Trip Time, referred to as: RTT), second TA, the strongest path delay.
  • the second TA is a timing advance of the UE sending data under the second access network device.
  • the first access network device receives, by the second access network device, a location of the UE under the second access network device.
  • the information may include: the first access network device receives the radio access network carrying the location information sent by the second access network device by using the second core network device in the second network (English: Radio Access Network, referred to as: RAN) ) Information request.
  • a second aspect of the embodiments of the present invention provides a CSFB implementation method, including:
  • the second access network device in the second network sends, to the first access network device in the first network, the UE that needs to drop the voice service from the currently camped second network to the first network in the second access network device.
  • the radio resource control Radio Resource Control, RRC for short
  • RRC Radio Resource Control
  • the second access network device sends the location information of the UE under the second access network device to the first access network device, and after sending the location information to the first access network device, Sending an RRC Connection Release message to the UE, so that the UE releases the connection with the currently camped second network.
  • the second access network device sends the location information of the UE under the second access network device to the first access network device, so that the first access network device can determine, according to the location information, that the UE is in the first access.
  • the search range of the possible location in the cell where the network device is located, and then searching according to the determined search range, the search is reduced compared to the entire cell in which the first access network device is located, thereby reducing the search range, thereby reducing the search range.
  • the second access network The device may send the location information of the UE to the second access network device to the first access network device, where the second access network device carries the location information in the RAN information request through the second core in the second network.
  • the network device sends to the first access network device.
  • the second network may be an LTE network, and correspondingly, the location information includes at least one of the following: RTT, second. TA, the strongest path delay.
  • the second TA is a timing advance of the UE sending data under the second access network device.
  • a third aspect of the embodiments of the present invention provides a first access network device, including:
  • a receiving unit configured to receive location information of the user equipment UE sent by the second access network device under the second access network device; the UE needs to return the voice service from the currently camped second network to the first network
  • the first access network device is an access network device in the first network
  • the second access network device is an access network device in the second network
  • a determining unit configured to determine a search range according to the location information received by the receiving unit
  • a searching unit configured to perform searching according to the search range determined by the determining unit
  • a establishing unit configured to establish a connection with the UE after the searching unit searches for the UE, to provide a voice service for the UE by using the first network.
  • a fourth aspect of the embodiments of the present invention provides a second access network device, including:
  • a sending unit configured to send, to the first access network device, location information of the user equipment UE under the second access network device, and send a radio resource control RRC connection release message to the UE, so that the UE releases the a connection of the second network;
  • the UE is a UE that needs to drop the voice service from the currently camped second network to the first network
  • the second access network device is an access network device in the second network
  • the first access network device is an access network device in the first network.
  • a fifth aspect of the embodiments of the present invention provides a first access network device, including: a radio frequency unit and a baseband processing unit.
  • the radio frequency unit is configured to perform the CSFB implementation method provided by the first aspect or the possible implementation manner of the first aspect to implement the function of the receiving unit in the third aspect.
  • the baseband processing unit is used in the CSFB implementation method provided by the first aspect or the possible implementation of the first aspect to implement the functions of the determining unit, the searching unit and the establishing unit in the third aspect.
  • a sixth aspect of the embodiments of the present invention provides a second access network device, including: a radio frequency unit.
  • the radio frequency unit is configured to perform the CSFB implementation method provided by the second aspect or the possible implementation manner of the second aspect to implement the function of the sending unit in the fourth aspect.
  • FIG. 1 is a simplified schematic diagram of a system architecture to which an embodiment of the present invention is applied according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for implementing CSFB according to an embodiment of the present invention
  • FIG. 3 is a flowchart of another CSFB implementation method according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of still another CSFB implementation method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a location relationship between a first access network device, a second access network device, and a UE according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a location relationship between another first access network device, a second access network device, and a UE according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of a positional relationship between a first access network device, a second access network device, and a UE according to an embodiment of the present disclosure
  • FIG. 8 is a schematic diagram of a search range according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a first access network device according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a second access network device according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram showing the composition of another first access network device according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of another second access network device according to an embodiment of the present invention.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • the CSFB technology includes two types of redirection and packet-switched (PS-switched).
  • PS-switched packet-switched
  • the access network device in the 2G/3G network can search according to the existing location information.
  • the voice service is implemented by using a 2G/3G network.
  • the access network device in the 2G/3G network needs to search in the entire cell, which may result in access.
  • the network device searches for the UE for a long time, so that the delay of the UE's voice service falling back to the 2G/3G network is large.
  • the embodiment of the present invention provides a CSFB implementation method.
  • the basic principle of the specific embodiment of the present invention is:
  • the first access network device in the network is connected Receiving, by the second access network device in the second network, location information that needs to be dropped from the second network that currently camps on the voice service to the UE in the first network, and then first,
  • the network access device can determine the search range according to the received location information, and finally reduces the search range by performing search according to the determined search range, thereby reducing the use of the redirection-based CSFB technology to the UE's voice service from the second.
  • FIG. 1 shows a simplified schematic diagram of a system architecture to which embodiments of the present invention may be applied.
  • the system architecture may include: a first access network device 101, a second access network device 102, a UE 103, a first core network device 104, and a second core network device 105.
  • the first access network device 101 is an access network device in the first network
  • the first core network device 104 is a core network device in the first network.
  • the first network may be a 2G/3G network.
  • the first network is a UMTS network, and correspondingly, the first access network device 101 is a NodeB, and the first core network device 104 is a radio network controller (English: Radio Network Controller, referred to as: RNC) And GPRS service support node (English: Service GPRS Supporting Node, referred to as: SGSN).
  • RNC Radio Network Controller
  • GPRS service support node English: Service GPRS Supporting Node, referred to as: SGSN
  • the first network is a GSM network, and correspondingly, the first access network device 101 is a base transceiver station (English: Base Transceiver Station, BTS for short), and the first core network device 104 is controlled by a base station. (English: Base Station Controller, referred to as: BSC).
  • the second access network device 102 is an access network device in the second network
  • the second core network device 105 is a core network device in the second network.
  • the second network may be an LTE/5G network.
  • the second network is an LTE network
  • the second access network device 102 is an eNodeB
  • the second core network device 105 is an MME.
  • the first access network device 101 and the second access network device 102 belong to the same coverage.
  • the UE 103 currently resides in the second network.
  • FIG. 2 is a flowchart of a method for implementing CSFB according to an embodiment of the present invention, such as As shown in FIG. 2, the method can include:
  • the first access network device receives location information of the UE sent by the second access network device under the second access network device.
  • the UE is a UE that needs to drop the voice service from the currently camped second network to the first network
  • the first access network device is an access network device in the first network
  • the second access network device is the An access network device in the second network.
  • the first network is a network that supports voice services
  • the second network is a network that does not support voice services.
  • voice services are required (for example, the UE needs to initiate a voice call on the second network).
  • the voice service needs to be dropped from the currently camped second network to the first network, and the first connection in the first network is before the voice service of the UE falls back from the second network to the first network.
  • the network access device may receive location information of the UE sent by the second access network device in the second network under the second access network device.
  • the first access network device determines a search range according to the location information.
  • the first access network device and the second access network device belong to the same coverage, so the first access network device may be configured by the second access network device according to the second access network device.
  • the lower position to approximate the location of the UE under the first access network device that is, the first access network device receives the location of the UE sent by the second access network device under the second access network device After the information, the first access network device can determine the search range according to the received location information.
  • the first access network device performs a search according to the search range, and after searching for the UE, establishes a connection with the UE, so as to provide a voice service for the UE by using the first network.
  • the search may be performed according to the determined search range, and after determining to search for the UE, establish a connection with the UE, and then use the first network as the UE.
  • the first access network device may perform a multi-path search manner according to the determined search range.
  • the CSFB implementation method provided by the embodiment of the present invention can be applied to the CSFB technology based on redirection.
  • the first access network device receives the first The location information of the UE sent by the second access network device under the second access network device, and determining the search range according to the received location information, and then searching according to the determined search range, and after searching the UE, with the UE
  • a connection is established to provide voice services to the UE over the first network.
  • the search is performed according to the search range of the received location of the UE under the second access network device, indicating that the UE is located in the cell where the first access network device is located, compared to the first connection.
  • the search is performed in the entire cell where the network access device is located, which reduces the search range, thereby reducing the delay when the voice service of the UE is dropped from the second network to the first network by using the CSFB technology based on the redirection.
  • FIG. 3 is a flowchart of another CSFB implementation method according to an embodiment of the present invention. As shown in FIG. 3, the method may include:
  • the second access network device sends, to the first access network device, location information of the UE under the second access network device.
  • the UE is a UE that needs to drop the voice service from the currently camped second network to the UE in the first network
  • the second access network device is the access network device in the second network
  • the first access network device is the first Access network equipment in the network.
  • the first network is a network that supports voice services
  • the second network is a network that does not support voice services.
  • the first access network device and the second access network device belong to the same coverage, so The small UE uses the CSFB technology to delay the delay of the voice service from the second network to the first network.
  • the second access network device in the second network may The location parameter information of the UE in the current cell, that is, the second access network device, is sent to the first access network device in the first network, so that the first access network device can be sent according to the UE sent by the second access network device.
  • the location under the second access network device approximates the location of the UE under the first access network device.
  • the second access network device sends an RRC connection release message to the UE.
  • the RRC connection release message may be sent to the UE, so that the UE can release the second network.
  • the connection in which the first access network device searches for the UE according to the location information of the UE under the second access network device, can re-establish a connection with the UE, thereby providing voice service for the UE through the first network.
  • the second access network device sends the location information of the UE under the second access network device to the first access network device, and after sending the location information to the first access network device, Sending an RRC Connection Release message to the UE, so that the UE releases the connection with the currently camped second network.
  • the second access network device sends the location information of the UE under the second access network device to the first access network device, so that the first access network device can determine, according to the location information, that the UE is in the first access.
  • the search range of the possible location in the cell where the network device is located, and then searching according to the determined search range, the search is reduced compared to the entire cell in which the first access network device is located, thereby reducing the search range, thereby reducing the search range.
  • FIG. 4 is a flowchart of still another method for implementing CSFB according to an embodiment of the present invention. As shown in FIG. 4, the method may include:
  • the CSFB implementation method provided by the embodiment of the present invention is specifically introduced by using the first network as the UMTS network and the second network as the LTE network, where no IP is deployed in the LTE network.
  • Multimedia Subsystem (English: IP Multimedia Subsystem, IMS for short), that is, the LTE network does not support voice services.
  • the first network is a UMTS network
  • the first access network device is a NodeB
  • the second network is an LTE network
  • the second access network device is an eNodeB.
  • the second access network device sends, to the first access network device, location information of the UE under the second access network device.
  • the UE is a UE that needs to drop the voice service from the currently camped second network to the UE in the first network
  • the second access network device is the access network device in the second network
  • the first access network device is the first Access network equipment in the network.
  • the first network is a network that supports voice services
  • the second network is a network that does not support voice services.
  • the first access network device and the second access network device belong to the same coverage, so
  • the second access network device in the second network may be in the Before the UE sends an RRC Connection Release message, the UE is in the Dang
  • the location parameter information in the pre-cell, that is, the second access network device is sent to the first access network device in the first network, so that the UE that is sent by the first access network device according to the second access network device is in the second
  • the location under the access network device approximates the location of the UE under the first access network device.
  • the eNodeB may send the UE to the NodeB under the eNodeB before sending the RRC connection release message to the UE.
  • location information may include at least one of the following: an RTT, a second TA, where the second TA is a time advance amount and a strongest path delay for the UE to send data under the eNodeB.
  • the second access network device may send the location information of the UE to the second access network device to the first access network device by using a RIM process.
  • the second access network device sends the location information in the RAN information request to the first access network device by using the second core network device; the second core network device is the core network device in the second network.
  • the second core network device is an MME
  • the eNodeB carries the location information in the RAN information request first to the MME, and then the MME sends the core network to the first network.
  • the device finally sends the location information to the NodeB by the core network device of the first network.
  • the MME sends the RAN information request carrying the location information to the SGSN
  • the SGSN sends the RAN information request carrying the location information to the SGSN.
  • RNC finally the location information is sent by the RNC to the NodeB.
  • the first access network device receives location information of the UE sent by the second access network device under the second access network device.
  • the first access network device can receive the UE sent by the second access network device. Location information under the second access network device.
  • the first access network device may receive, by using a RIM process, location information of the UE sent by the second access network device under the second access network device.
  • the first access network device may receive the RAN information request that carries the location information that is sent by the second access network device by using the second core network device.
  • the second access network device sends an RRC connection release message to the UE.
  • the second access network device may send an RRC connection release message to the UE, so that the UE The connection with the second network is released, thereby facilitating the UE to access the first network.
  • the RRC connection release message sent by the second access network device to the UE may carry the target cell, that is, the first A system message of a cell in which the access network device is located, the system message of the cell where the first access network device is located is pre-stored in the second access network device.
  • the eNodeB sends an RRC connection release message to the UE, so that the UE releases the connection with the LTE network, where the eNodeB sends the UE to the UE when the UE uses the CSFB technology based on the RIM process to implement the fallback of the voice service from the LTE network to the UMTS network.
  • the RRC connection release message sent may carry the target cell, that is, the system message of the cell where the NodeB is located.
  • the first access network device may determine whether the UE is a UE redirected from the second network by determining whether the location information of the UE is received, and if yes, the first The access network device determines the search range according to the received location information of the UE. Specifically, the first access network device may determine the search range by performing the following steps 404-406.
  • the first access network device determines the first distance a according to the location information.
  • the first distance a is a distance between the UE and the second access network device.
  • the first access network device may determine the distance between the UE and the second access network device according to the location information of the UE under the second access network device, that is, the first distance a.
  • the first access network device determines the first distance a according to the location information, and the first access network device determines the location information according to the location information. Tp and the strongest path position, the first distance a is determined according to the Tp and the strongest path position.
  • the first network can also be a GSM network.
  • the first access network device determines the first distance a according to the location information, including: the first access network device determines the first TA according to the location information; and the first TA is the UE in the first access network. The timing advance of transmitting data under the device; then determining the first distance a according to the first TA.
  • the first access network device determines, according to the first distance a and the second distance b, a reference range of a distance between the UE and the first access network device.
  • the second distance b is the distance between the first access network device and the second access network device (the second distance b is pre-configured in the first access network device), and the reference range is
  • the location relationship between the first access network device, the second access network device, and the UE may be as shown in FIG. 5-7. Therefore, the distance between the UE and the first access network device is The reference range may be: greater than or equal to
  • the first access network device determines a search range according to the reference range and a cell search radius r of the first access network device.
  • the search range may be determined according to the reference range and the cell search radius r of the first access network device, where If the cell search radius r of the first access network device is greater than or equal to
  • the first access network device performs a search according to the search range, and after searching for the UE, establishes a connection with the UE, so as to provide a voice service for the UE by using the first network.
  • the search may be performed according to the determined search range, because the cell search radius r in the first access network device When the value is greater than or equal to
  • the search range of the first access network device is as shown in the figure.
  • the first access network device receives the location information of the UE sent by the second access network device under the second access network device, and determines the search range according to the received location information, and then Searching according to the determined search range, and after searching for the UE, establishing a connection with the UE to provide voice services for the UE through the first network.
  • the search is performed according to the search range of the received location of the UE under the second access network device, indicating that the UE is located in the cell where the first access network device is located, compared to the first connection.
  • the search is performed in the entire cell where the network access device is located, which reduces the search range, thereby reducing the delay when the voice service of the UE is dropped from the second network to the first network by using the CSFB technology based on the redirection.
  • FIG. 9 is a schematic diagram of a composition of a first access network device according to an embodiment of the present invention. As shown in FIG. 9, the method includes: a receiving unit 51, a determining unit 52, a searching unit 53, and an establishing unit 54.
  • the receiving unit 51 is configured to receive location information of the user equipment UE sent by the second access network device under the second access network device, where the UE needs to return the voice service from the currently camped second network to The UE of the first network, the first access network device is an access network device in the first network, and the second access network device is an access network device in the second network.
  • the determining unit 52 is configured to determine a search range according to the location information received by the receiving unit 51.
  • the searching unit 53 is configured to perform a search according to the search range determined by the determining unit 52.
  • the establishing unit 54 is configured to establish a connection with the UE after the searching unit 53 searches for the UE, to provide voice service for the UE by using the first network.
  • the determining unit 52 is specifically configured to determine the first distance a according to the location information, where the first distance a is the UE and the second access network device. a distance between the UE and the first access network device according to the first distance a and the second distance b; the second distance b is the first access network a distance between the device and the second access network device, the reference range is
  • the search range determined by the determining unit 52 is
  • the first network is a universal mobile communication system UMTS network; the determining unit 52 is specifically configured to determine a transmission delay Tp and a strongest path position according to the location information; The Tp and the most strong path position determine the first distance a.
  • the first network is a global mobile communication system GSM network; the determining unit 52 is specifically configured to determine a first timing advance TA according to the location information; the first TA And a time advance amount for the UE to send data under the first access network device; determining the first distance a according to the first TA.
  • GSM global mobile communication system
  • the second network is a long-term evolution LTE network
  • the location information received by the receiving unit 51 includes at least one of the following: an RTT, a second TA, and a strongest path delay. .
  • each functional module in the first access network device may refer to a specific description of the corresponding process in the method embodiment.
  • the embodiments of the present invention are not described in detail herein.
  • the first access network device provided by the embodiment of the present invention is configured to execute the foregoing CSFB implementation method, so that the same effect as the CSFB implementation method described above can be achieved.
  • FIG. 10 is a schematic structural diagram of a second access network device according to an embodiment of the present invention. As shown in FIG. 10, the method includes: a sending unit 61.
  • the sending unit 61 is configured to send, to the first access network device, location information of the user equipment UE under the second access network device, and send a radio resource control RRC connection release message to the UE, so that the UE releases and a connection of the second network; the UE is a UE that needs to drop a voice service from a currently camped second network to a first network, and the second access network device is an access in the second network.
  • the network device where the first access network device is an access network device in the first network.
  • the sending unit 61 is specifically configured to carry the location information in the radio access network RAN information request to the first access network device by using the second core network device.
  • the second core network device is a core network device in the second network.
  • the second network is a long-term evolution LTE network
  • the location information sent by the sending unit 61 includes at least one of the following: an RTT, a second TA, and a strongest path delay. .
  • the second TA is a timing advance of the UE sending data under the second access network device.
  • the second access network device provided by the embodiment of the present invention is configured to execute the foregoing CSFB implementation method, so that the same effect as the CSFB implementation method described above can be achieved.
  • FIG. 11 is a schematic diagram of another first access network device according to an embodiment of the present invention. As shown in FIG. 11, the method includes: a radio frequency unit 71 and a baseband processing unit 72.
  • the radio frequency unit 71 is configured to implement the CSFB implementation method provided in FIG. 2 or FIG. 4 to implement the function of the receiving unit 51 in the first access network device shown in FIG. 9.
  • the radio frequency unit 71 can be used to perform step 201 in the CSFB implementation method provided in FIG. 2 to implement the function of the receiving unit 51 in the first access network device shown in FIG.
  • the radio frequency unit 71 can also be used to perform step 402 in the CSFB implementation method provided in FIG. 4 to implement the function of the receiving unit 51 in the first access network device shown in FIG.
  • the baseband processing unit 72 is configured to perform the CSFB implementation method provided in FIG. 2 or FIG. 4 to implement the functions of the determining unit 52, the searching unit 53, and the establishing unit 54 in the first access network device shown in FIG. 9.
  • baseband processing unit 72 may be operable to perform step 202 of the CSFB implementation method provided in FIG. 2 to implement the functionality of determining unit 52 in the first access network device illustrated in FIG.
  • the baseband processing unit 72 can also be used to perform step 203 in the CSFB implementation method provided in FIG. 2 to implement the functions of the search unit 53 and the establishing unit 54 in the first access network device shown in FIG.
  • the baseband processing unit 72 can be used to perform step 404, step 405, and step 406 in the CSFB implementation method provided in FIG. 4 to implement the function of the determining unit 52 in the first access network device shown in FIG. 9.
  • the baseband processing unit 72 can also be used to perform step 407 in the CSFB implementation method provided in FIG. 4 to implement the functions of the search unit 53 and the establishing unit 54 in the first access network device shown in FIG.
  • each functional module in the first access network device provided by the embodiment of the present invention may be referred to the specific description of the corresponding process in the method embodiment, and details are not described in detail herein.
  • the first access network device provided by the embodiment of the present invention is configured to execute the foregoing CSFB implementation method, so that the same effect as the CSFB implementation method described above can be achieved.
  • FIG. 12 is a schematic diagram showing the composition of another second access network device according to an embodiment of the present invention. As shown in FIG. 12, the method includes: a radio frequency unit 81.
  • the radio frequency unit 81 is configured to implement the CSFB implementation method provided in FIG. 3 or FIG. 4 to implement the function of the sending unit 61 in the first access network device shown in FIG. 10.
  • the radio frequency unit 81 can be used to perform steps 301 and 302 in the CSFB implementation method provided in FIG. 3 to implement the functions of the transmitting unit 61 in the second access network device shown in FIG.
  • the radio frequency unit 81 can also be used to implement the CSFB provided in FIG. Step 401 and step 403 in the current method to implement the function of the transmitting unit 61 in the second access network device shown in FIG.
  • the second access network device may further include a baseband processing unit 82 for performing processing of the baseband signal.
  • the second access network device provided by the embodiment of the present invention is configured to execute the foregoing CSFB implementation method, so that the same effect as the CSFB implementation method described above can be achieved.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used.
  • the combination may be integrated into another device, or some features may be ignored or not performed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may be one physical unit or multiple physical units, that is, may be located in one place, or may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or may be two or two.
  • the upper unit is integrated in one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a device (which may be a microcontroller, chip, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (English: Read-Only Memory, abbreviated as: ROM), a random access memory (English: Random Access Memory, abbreviated as: RAM), a magnetic disk or an optical disk, and the like.
  • ROM Read-Only Memory
  • RAM Random Access Memory

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Abstract

Les modes de réalisation de l'invention ont trait au domaine des communications et concernent un procédé de mise en oeuvre de repli sur commutation de circuits (CSFB) et un dispositif de réseau d'accès permettant de résoudre le problème lié à un retard important lorsque le service vocal d'un équipement utilisateur (UE) se replie d'un réseau LET/5G sur un réseau 2G/3G, au moyen d'une technique CSFB basée sur la redirection. Dans la solution selon l'invention : un premier dispositif de réseau d'accès dans un premier réseau reçoit des informations de position d'un UE par rapport à un deuxième dispositif de réseau d'accès dans un deuxième réseau, envoyées par le deuxième dispositif de réseau d'accès, l'UE demandant le repli du service vocal du deuxième réseau dans lequel se trouve à ce moment l'UE sur le premier réseau ; le premier dispositif de réseau d'accès détermine, en fonction des informations de position, une plage de recherche ; et le premier dispositif de réseau d'accès recherche selon la plage de recherche et, après avoir trouvé l'UE, établit une connexion avec celui-ci, de sorte à fournir le service vocal pour l'UE au moyen du premier réseau. Les modes de réalisation de la présente invention sont utilisés dans le processus de mise en oeuvre de CSFB basé sur la redirection.
PCT/CN2016/083357 2016-05-25 2016-05-25 Procédé de mise en oeuvre de csfb et dispositif de réseau d'accès WO2017201694A1 (fr)

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WO2020010990A1 (fr) * 2018-07-12 2020-01-16 华为技术有限公司 Procédé et dispositif permettant d'établir un service vocal
CN112205029A (zh) * 2018-05-28 2021-01-08 高通股份有限公司 基于ue的快速返回至5g

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